Permutation hasp-lock



E. W. FLAGG.

PERNIUTATION HSP LOCK.

APPLICATION man Nov.1. |916.

Patented Apr. 6, 1920.

6' MIJN INVENTOR la /l/feaj ATTORNEY UNITED STATES PATE OETCE."

EARL W. FLAGG, OF TENINO, WASHINGTON.

PERMUTATION' HAsr-Lo'cK.

Specification of Letters Patent.

Patented Apr. c, 1920.

Application led 1\ovcmber 1, 1916. Serial No. 128,987.

To all whom t may concern:

Be it known that LEARL W. FLAGG, a citi zen of the United States,residing at Tenino, in the county of Thurston and State of Washington,have invented certain new and useful Improvements in Permutation Hasp-.L'ocks, of which the following is a specitication.

` This invention relates generally to locks, and particularly tocombination or permutation locks.

- The primary object of the invention is to provide a permutation lockadapted parlticularly for use upon hasps v'or the like vide a device ofthe character set forth which may be manufactured at low cost, which isfeatured by the lack of intricate or complicated parts,` which ispositive lin operation, and which will prove thoroughly j efficient inpractice.

With these objects in view, together with others which will appear asthe description proceeds, the invention resides in the novel formation,combination, and arrangement of parts, all as will be described more'fully hereinafter, illustrated in the drawings, and particularlypointed out in the claim.

In'the drawings Figure 1 is a plan View of a'hasp lock embodying the pinvention;

Fig. 2 is a longitudinal sectional view taken substantially upon line2-2 of F ig. 1; Fig. 3 is a sectional view taken upon line 3443 of Fig.2 and looking in the direction of the arrows;

Fig. 4 is a similar view taken on line 4 4: ofi` ig. 2;

' Fig. 5 is a similar view taken on line 5*-5 of Fig. 2; and

" Fig. 6 is a transverse sectional view taken on line 6 6 of Fig. 2.

Referring now more particularly to the drawings, the hasp is indicatedgenerally at 10, and comprises a .pair of leaves 11 and 12 hingedlyconnected together at their adjacent ends as at 13. It will beunderstood that the leaf 11 is to be secured either to the fixed body orto the movable top of a box, trunk or the like, and the leaf 12 -is toextend over to the opposite member to secure the same together, and 'aplate 111A may be secured as by screws 15 tothe lid or body adjacent theend of the leaf12 and is equipped with a staple or eye 16 adapted toengage within the opening 17 in the end of the hasp strap 12.

The extreme end of the leaf 12 is enlarged as shown, and the outersurface of the `said leaf is provided with an annular boss 18 vofrelatively shallow depth. An annular groove is made in the outerexterior edgev of the boss, within which the open end of a barrelVsection 2O is threadedly engaged. This barrel section may be readilyapplied to and detached from the boss or section 18, and is closed atits outer end by avplate 21, uponwhich is'rotatably mounted apermutation dial 22 having the usual knob 23. The dial 22 is equippedwith a central inwardly extending pin 211, the latter extending throughthe plate 21 and has ixedly secured to its inner end a tumbler 25. Thistumbler will rotate with the pin 24 and 'has its edge notched as at'26,as is usual, and is also provided with a lplurality ofy'evenly spacedthreaded openings 27, the latter being adapted to receive a pin 28. Thekopenings in the tumbler may be numbered 'Acorresponding to the numbersupon the dial 22, and the pin 28 may be changed from one opening to theother'when it is desired to change the combination of the lock.

Secured as by screws 29 to the outerportion or face of the boss 18 is adiaphragm 30, the latter being notched as at 31 fora v purpose to behereafter pointed out. Se-

cured to `the outermost face of the diaphragm 30 and centrally thereofis a pivot pin 32, upon which is rotatably mounted a tumbler 33 similarin size, shape, and construction to the tumbler 25 above detailed.

The notches in the rotatable tumblers `are adapted to aline when thesame have been operated to release the latch bolt to be hereafterdetailed and the pins 28 project from the adjacent faces of the saidtumblers and yare adapted to engage when the tumbler 25 is sufficientlyrotated, to enable the tumblers to be properly positioned. Byprovidingeach of the rotary tumblers with aplurality of threadedapertures, arranged in spaced relation, it is obvious that thecombination may be readily changed by moving the pins 28.

Arranged for sliding movement diametrically across the barrel and withinthe boss 18, is a lock bolt 35. This bolt is provided with anl elongatedslot 36, through which a guide pin 37 extends to maintain the bolt atall times in proper position upon the hasp leaf. rlhe bolt projects atone end beyond the side of the barrel as shown, so as to be readilygrasped by the fingers to be slid into locking or unlocking position.The central portion of the bolt is widened as at 38, and the saidwidened portion is cut away as at 39 to provide an opening. Projectinginto the opening from one of the edges thereof is a tongue 40, thelatter being disposed in the same general direction as that assumed bythe bolt when sliding. The ltongue 40 corresponds in length with theslot 36, and is so positioned upon the hasp leaf 12 as to extendtransversely across the staple receiving opening 17 thereof. When thebolt has been moved to locking position, the tongue 40 will projectthrough the staple 16, but when the bolt is moved to inoperative orunlocked position, the said tongue will be withdrawn from within theinwardly projecting staple, and the leaf l2 of the hasp will be free toswing upon its pivot.

The inner end of the bolt 35 is provided with a fence member 41; thelatter being disposed at right angles to the hasp and within the barrel,and projects through the opening or slot 31 in the diaphragm 30. Whenthe bolt is moved inwardly of the barrel to its eXtreme limit, the fencemember lies beyond the peripheries of the rotatable tumblers 25 and 33,and the latter are capable of being freely rotated upon rotary movementbeing applied to the dial knob 23. When the notches in the tumblers arealined and disposed adjacent and in the path of movement of the fencemember 41, outward movement of the bolt will cause the said fence memberto slide within the alined notches, and the tongue 40 carried by thebolt will be disengaged from the staple 16. lt is to be noted, however,that the fence 41 is of such length as to be held against outwardsliding movement by the edge of either of the tumblers.

The boss 18 is provided with a shallow slot or opening 42, whichregisters with a notch 43 in the threaded inner edge of the barrelsection 20 when the latter has been tightly screwed upon the said boss.These alined notches or slotted portions are disposed adjacent theinnermost end of the lock bolt, and the fence member 41 is provided withan angularly extending lug 44,`

the latter being adapted when the bolt is in locking position to enterthe alined slot and notch to lock the rotatable barrel section upon theboss. When the bolt 35 has been moved outwardly of the barrel, the lug44 will be withdrawn from engagement within the alined slot and notch,and the removable barrel section 20 may be unscrewed from the fixedsection or boss 18 to permit of access being had to the interior of thelock casing, should it be desired to change the combination, or torepair the lock mechanism. j

ln operation, the movable leaf 12 of the hasp is moved toward the staple16 secured to the trunk or boX section, and the said staple extendsthrough the opening 17. rlhe bolt 35 is then moved inwardly of thebarrel, whereupon the tongue 40 passes through the staple projectinginto the barrel; the fence member 41 passes out of the alined notches jin the tumblers 25-33; and the detent or lug 44 passes into the apertureformed by the alined slot and notch 42--43. Turning of the knob 23 willcause the disk 25 to lmove its notch out of alinement with the notch inthe tumbler 33 and continued rotation of the knob will, by engagement ofthe pins 28, cause the inner tumbler 33 to move out of unlockingrelation with the said key member. With the tumblers in such position,it will be impossible to move the lock bolt to unlocking position, andin order to properly aline the notches in the tumblers, it is necessarythat the dial 22 be rotated the proper number of times and in the properdirections, accordingly as the pins 28 are positioned upon the tumblers.

From this description, it is apparent that l have provided a lock whichis featured by the lack of intricate and complicated mechanism; which iscapable of being readily operated by those having knowledge of theproper combination; which can not be actuated without properlypositioning the tumblers; and which, when in locked position, renders itimpossible to remove the detachable barrel section.

A locking screw 19 is threaded from the inner face of the leaf l2,through the boss 18, and is adapted to engage in asuitable notch oropening in the barrel section edge to hold the latter against rotation.This screw can only be removed when the hasp is in open position, andits function is to prevent unscrewing of the barrel when the hasp isclosed.

1While the present is a disclosure of the preferred embodiment of theinvention, it is to be understood that the invention is not limitedthereto, but that various changes may be made in the construction,arrangement and proportion of parts, without departing from the scope ofthe invention, as defined in the appended claim.

What is claimed is z- A lock of the character specified, comprising aleaf mounted to swing andhaving an opening at its free end to receive astaple,

, and having an offstanding boss surrounding the opening, a diaphragmsecured on the boss and notched in its edge, a barrel threaded to theboss, a plate closing the outer end of the barrel, tumblers rotatablymounted on the diaphragm and plate and notched in their outer edges7operating means for the tumblers including a knob exterior to the plate,a lock bolt slidable on the leaf in the space formed between it and thesaid diaphragm and having an enlarged portion in which is formed anopening, said lock bolt having a staple engaging tongue projecting intothe opening anda laterally projecting extension to enter the registeringnotches of the tumblers and diaphragm, and a lug carried by the lockbolt and adapted to engage the boss and barrel to secure the latter whenthe lock bolt is projected into locked engagement with the staple.

In testimony whereof I aix my signature in presence of two witnesses.

EARL W. FLAGG. Witnesses: y

JOHN DESPAIR, H. E. RoBBINs.

